Conradi, H. J. , Gerlsma, C. , van Duijn, M. , & de Jonge, P. (2006). Internal and external validity of the experiences in close relationships questionnaire in an American and two Dutch samples. European Journal of Psychiatry, 20(4), 258-269.

Dressing, H., Kuehner, C., & Gass, P. (2005). Lifetime prevalence and impact of stalking in a European population: Epidemiological data from a middle-sized German city. British Journal of Psychiatry, 187, 168-172.